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3 years ago

In the hydrologic cycle, water from the ocean into the atmosphere where it can and change back into tiny water droplets.

1 answer:

Alex3 years ago

8 0

Hmmmm that’s a question you just have to take the time to think about the more you think about it the more u will get it u can take as much time as u need

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3. Which element is most important for growing crops?

madreJ [45]

Answer:

B. hydrogen

Explanation:

that's because hydrogen is an element.

8 0

3 years ago

Sodium hydrogen carbonate, on heating, produces sodium carbonate, water and carbon dioxide.

RoseWind [281]

The mass of sodium hydrogen carbonate : 10.5 g

<h3>Further explanation</h3>

Given

1.5 dm' of CO₂

1 mol gas= 24 L at RTP(25 °C, 1 atm)

Required

the mass of sodium hydrogen carbonate

Solution

Decomposition reaction of Sodium hydrogen carbonate :

2 NaHCO₃ (s) ⇒ Na₂ CO₃ (s) + H₂ O(g) + CO₂ (g)

mol CO₂ :

$\tt mol=\dfrac{1.5}{24}=0.0625$

From the equation, mol ratio of NaHCO₃ : CO₂ (g) = 2 : 1, so mol NaHCO₃ :

$\tt 2\times 0.0625=0.125$

Mass NaHCO₃(MW=23+1+12+3.16=84 g/mol) :

$\tt mass=mol\times MW\\\\mass=0.125\times 84\\\\mass=10.5$

3 0

3 years ago

How many hydrogen atoms are present in a hydrocarbon chain of five carbon atoms with two double bonds and two single bonds?

VashaNatasha [74]

Is it multiple choice? if not, five.

7 0

3 years ago

The photoelectric effect occurs when _____ are emitted from metal when the metal is struck by light of certain frequencies.

Ainat [17]

Answer:

electrons

Explanation:

The photoelectric effect occurs when electrons are emitted from metal when the metal is struck by light of certain frequencies.

Some of the applications of this effect include photomultipliers (which are a key component in spectroscopy instruments) and night vision devices.

4 0

3 years ago

Read 2 more answers

Type the temperatures in Kelvin) in the left column

docker41 [41]

Answer: the data appear to be ( linear )

The line of best fit is v= 0.003 t+ 0.003

Notice the the value of the v intercept is close to 0 so V and t are ( directly proportional)

8 0

4 years ago

Read 2 more answers